package org.tea.inventory.db.util;

import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class PYIndexStrUtil {
	/**
	 * 判断是否是中文
	 * @param str
	 * @return
	 */
	public static boolean isChinese(String str) {
		String regEx = "[\u4e00-\u9fa5]";
		Pattern pat = Pattern.compile(regEx);
		Matcher matcher = pat.matcher(str);
		boolean flg = false;
		if (matcher.find())
			flg = true;

		return flg;
	}
	/**
	 * 返回首字母
	 * @param strChinese
	 * @param bUpCase
	 * @return
	 */
	public static String getPYIndexStr(String strChinese, boolean bUpCase){
		try{
			StringBuffer buffer = new StringBuffer();
			byte b[] = strChinese.getBytes("GBK");//把中文转化成byte数组
			for(int i = 0; i < b.length; i++){
				if((b[i] & 255) > 128){
					int char1 = b[i++] & 255;
					char1 <<= 8;//左移运算符用“<<”表示，是将运算符左边的对象，向左移动运算符右边指定的位数，并且在低位补零。其实，向左移n位，就相当于乘上2的n次方
					int chart = char1 + (b[i] & 255);
					buffer.append(getPYIndexChar((char)chart, bUpCase));
					continue;
				}
				char c = (char)b[i];
				if(!Character.isJavaIdentifierPart(c))//确定指定字符是否可以是 Java 标识符中首字符以外的部分。
					c = 'A';
				buffer.append(c);
			}
			return buffer.toString();
		}catch(Exception e){
			System.out.println((new StringBuilder()).append("\u53D6\u4E2D\u6587\u62FC\u97F3\u6709\u9519").append(e.getMessage()).toString());
		}
		return null;
	}
	
	/**

	 * 得到首字母

	 * @param strChinese

	 * @param bUpCase

	 * @return

	 */

	private static char getPYIndexChar(char strChinese, boolean bUpCase){
		int charGBK = strChinese;
		char result;
		if(charGBK >= 45217 && charGBK <= 45252)
			result = 'A';
		else if(charGBK >= 45253 && charGBK <= 45760)
			result = 'B';
		else if(charGBK >= 45761 && charGBK <= 46317)
			result = 'C';
		else if(charGBK >= 46318 && charGBK <= 46825)
			result = 'D';
		else if(charGBK >= 46826 && charGBK <= 47009)
			result = 'E';
		else if(charGBK >= 47010 && charGBK <= 47296)
			result = 'F';
		else if(charGBK >= 47297 && charGBK <= 47613)
			result = 'G';
		else if(charGBK >= 47614 && charGBK <= 48118)
			result = 'H';
		else if(charGBK >= 48119 && charGBK <= 49061)
			result = 'J';
		else if(charGBK >= 49062 && charGBK <= 49323)
			result = 'K';
		else if(charGBK >= 49324 && charGBK <= 49895)
			result = 'L';
		else if(charGBK >= 49896 && charGBK <= 50370)
			result = 'M';
		else if(charGBK >= 50371 && charGBK <= 50613)
			result = 'N';
		else if(charGBK >= 50614 && charGBK <= 50621)
			result = 'O';
		else if(charGBK >= 50622 && charGBK <= 50905)
			result = 'P';
		else if(charGBK >= 50906 && charGBK <= 51386)
			result = 'Q';
		else if(charGBK >= 51387 && charGBK <= 51445)
			result = 'R';
		else if(charGBK >= 51446 && charGBK <= 52217)
			result = 'S';
		else if(charGBK >= 52218 && charGBK <= 52697)
			result = 'T';
		else if(charGBK >= 52698 && charGBK <= 52979)
			result = 'W';
		else if(charGBK >= 52980 && charGBK <= 53688)
			result = 'X';
		else if(charGBK >= 53689 && charGBK <= 54480)
			result = 'Y';
		else if(charGBK >= 54481 && charGBK <= 55289)
			result = 'Z';
		else
			result = (char)(65 + (new Random()).nextInt(25));
		if(!bUpCase)
			result = Character.toLowerCase(result);
		return result;
	}

	/**
	 * 判断是否全是数字
	 * @param str
	 * @return
	 */
	public static boolean isNumeric(String str){
		Pattern pattern = Pattern.compile("[0-9]*");
		return pattern.matcher(str).matches();
	}

}
